<div class="layui-side layui-bg-black">
    <div class="layui-side-scroll">
        <!-- 左侧导航区域（可配合layui已有的垂直导航） -->
        <ul class="layui-nav layui-nav-tree" >
            {foreach name="menu" id="vo"}
            <li class="layui-nav-item">
                <a class="" href="javascript:;"> {$vo.title}</a>
                <dl class="layui-nav-child">
                    {foreach name="vo.children" id="child"}
                    <dd><a href="{:url($child.name)}">{$child.title}</a></dd>
                    {/foreach}
                </dl>
            </li>
            {/foreach}
        </ul>
    </div>
</div>